SN74AHC138集成電路（IC）的信號(hào)開關(guān)多路復(fù)用器解碼器規(guī)格書PDF中文資料

SN74AHC138屬于集成電路（IC）的信號(hào)開關(guān)多路復(fù)用器解碼器。由德州儀器制造生產(chǎn)的SN74AHC138信號(hào)開關(guān)，多路復(fù)用器，解碼器邏輯型信號(hào)開關(guān)、多路復(fù)用器和編碼器 IC 可用于對(duì)以數(shù)字格式表示數(shù)據(jù)的電信號(hào)進(jìn)行路由和選擇。這些器件與設(shè)計(jì)用于模擬信號(hào)的類似產(chǎn)品有所不同，它們保留的信息表示為兩個(gè)電狀態(tài)之一，而不是兩個(gè)外部界限內(nèi)的無窮變化量。

1 Features

? AEC-Q100 qualified for automotive applications:

– Device temperature grade 1: -40°C to +125°C

– Device HBM ESD classification level 2

– Device CDM ESD classification level C4B

? Available in wettable flank QFN package

? Operating range 2V to 5.5V VCC

? Low delay, 10.5ns (VCC = 5V, CL = 50pF

? Latch-up performance exceeds 250mA

per JESD 17

2 Applications

? Memory device selection with shared data bus

? Reduce required number of outputs for chip select

applications

? Route data

3 Description

The SN74AHC138-Q1 is a three to eight decoder with

one standard output strobe (G2) and two active low

output strobes (G 1 and G 0). When the outputs are

gated by any of the strobe inputs, they are all forced

into the high state. When the outputs are not disabled

by the strobe inputs, only the selected output is low

while all others are high.